222650 - acrobat plug-in is installed but ignored until Help:About Plug-ins is accessed

Status: RESOLVED DUPLICATE of bug 220730

(Core Graveyard :: Plug-ins, defect)

Description

[jsheldon]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.4) Gecko/20030624
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.4) Gecko/20030624

This problem seems to be the opposite of the problems with the acrobat plug-in
reported by others.

I would like pdf files to open in the browser using the acrobat plug-in.  I have
Adobe Acrobat 5.0 (installed long ago), and recently installed Mozilla (v. 1.4)
for the first time.  I copied nppdf32.dll to C:\Program
Files\mozilla.org\Mozilla\plugins, and I have made sure that "Display PDF in
Browser" is selected in the Acrobat Preferences. If I launch Mozilla and click
on a link to a pdf file (MIME type application/pdf), the plug-in does not load
and I get a download dialog box instead, as if Mozilla doesn't know what to do
with the MIME type. HOWEVER, if I access Mozilla's Help: About Plug-ins, the
Acrobat plug-in is listed as installed, and then afterwards, the plug-in works
as it should.  In other words, Mozilla seems not to be looking for its installed
plug-ins until Help: About Plug-ins forces it to.

Reproducible: Always

Steps to Reproduce:
1.Launch Mozilla
2.Access a web page containing links to pdf files
3.Click on a link to a pdf file
4.A download dialog appears.  Note that the MIME type is application/pdf, which
should trigger the plug-in.
5.Cancel the download
6.On the Mozilla toolbar, click Help:About Plug-ins
7.Note that the acrobat plug-in is installed.
8.Click on a link to a pdf file again.
9.The acrobat plug-in loads and the file is displayed in the browser as it
should be.

Actual Results:  
See above

Expected Results:  
Loaded the pdf file in the browser using the plug-in the first time

Comment 1

[Frank Wein [:mcsmurf]]

*** This bug has been marked as a duplicate of 220730 ***